joska wrote:IDE is an integral part of the Falcon custom chipset, so replacing it does not make sense.
Once again I reported a post, not posted as a comment. Sorry about that.
For a couple bucks users can purchase a small iDE to SATA adapter.
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joska wrote:IDE is an integral part of the Falcon custom chipset, so replacing it does not make sense.
joska wrote:mikro wrote:mpattonm wrote:Switching DSP to 56301 will be a little setback, but hey - its a fun project and thats where the fun is. So back to the schematics.
Awesome. Just want to mention it - in this case some minor changes to the TOS are going to be needed.
If TOS needs to be changed to work with the 56301, how would compatibility with games and demos be?
mikro wrote:Your gut feeling was right, it can not work like that. I even guessed it, Videl is indeed using VID32 to sync with the Combel (for ST-RAM access). So *that* is the reason why they put 32.08... for compatibility on the external pin when master clock was changed. You are free to modify 25.175 or external clock (they work independently from the system bus) but not VID32, must be the same as master clock.
So you can rewire it a bit - instead of switching between 32.08.../custom clock on VID32 you keep the line from the master clock on VID32 and put the exact same switch on the external clock pin.
mpattonm wrote:Not sure if I understand correctly, do you mean something like.... this?
Rustynutt wrote:Visually check the SDMA CLKIN point. The common trace from the COMBEL to both the FPU clock and SDMA clock makes a small but severe dog leg turn around another IC's resistor. From normal view, the "jump" under the resistor is left of the SDMA clock pin, about 20mm.
Rustynutt wrote:Could you also consider a PGA or modified DSP pinout where the DSP can relatively easily swapped out?
Without a 56k sheet in front of me, recall the 56002 and upward compatible have a few pins swapped. They may also include increased memory management.
Rustynutt wrote:68030 PGA socket.
Kind of out from the scope of "the long journey", a nice additional feature would be to add separate oscillator sockets for IC's which in the past have had traces cut to insert a different clock. ie, DSP, FPU, MIDI and KB IC, VIDEL, VIDEL Genlock.
Pretty much any speeder, accelerator, CPU upgrade, basically all the reasons more Falcons didn't make it out from the System 7 wars
calimero wrote:And what are final specs.?
calimero wrote:Btw
Original Falcon board was also 4 layered?
calimero wrote:Btw2
Will you made this opensource so anybody can make their Dream-Falcon?
mpattonm wrote:calimero wrote:Btw
Original Falcon board was also 4 layered?
Really? I did not know that. All I have ever seen was 6 layer PCB versions. That would perhaps explain some of the weird routing artefacts that make no sence at all.
Greenious wrote:I'm impressed by the work so far and really like where this is going!
A thought... given that most ppl interested in this new mobo probably want something faster than 030 & FPU, how about lifting them off the mobo to a daughterboard for the expansionbus instead? You can save some more space and people dont have to buy a CPU they will not use...
shoggoth wrote:This probably rules out the CT6x, since it needs the original 030 to be present during boot (god knows why).
Rustynutt wrote:Could you also consider a PGA or modified DSP pinout where the DSP can relatively easily swapped out?
Without a 56k sheet in front of me, recall the 56002 and upward compatible have a few pins swapped. They may also include increased memory management.
christos wrote:Just a thought. It is not really far from a falcon clone now, is it?
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